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<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
</body>
</html>
<script>
    var obj ={name:'张三',age:18,xingqu:['left']}
    function skb(obj){
        var obj2=Array.isArray(obj)? []:{}
        for(var key in obj){
            if(typeof obj[key]=='object'){
                obj2[key]= skb(obj[key])
            }else{
                obj2[key]= obj[key]
            }

        }
        return obj2
    }
    var obj2 = skb(obj)
    console.log(obj2);
    obj.xingqu.push('right')
    console.log(obj,obj2);

</script>